\geometry
\mybegin %%%%%%%% <-- can be customized begin and end
	papersize     = { 130mm , 184mm } ,
	lines         = 25 ,
	hmargin       = 15mm ,
	bindingoffset = 5mm ,
	headheight    = 10pt ,
	headsep       = \baselineskip ,
	includehead   = true ,
	vcentering    = true
\myend %%%%%%%% <-- can be customized begin and end
